Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 354 · 40 questions

The trick (Choose a trick): × 9 → finger trick; × 4 → double double; × 10, 100, 1000 → slide and add zeros. 37, 12345679 or 111… → magic patterns; reverse and subtract → 1089. Puzzles: find the rule, the total or the leftover days, then check your answer.

1. 1.40 × 4 =
2. 2.If today is Monday, what day will it be after 46 days? (a) Thursday (b) Friday (c) Monday (d) Saturday
3. 3.If today is Sunday, what day will it be after 55 days? (a) Tuesday (b) Friday (c) Sunday (d) Saturday
4. 4.Double 53 =
5. 5.39 × 1000 =
6. 6.The 3rd of a month is a Saturday. What day is the 19th of the same month? (a) Monday (b) Tuesday (c) Thursday (d) Sunday
7. 7.6 × ? = 6000
8. 8.I thought of a number, multiplied it by 3 and added 8. I got 38. What was my number?
9. 9.32 × 4 =
10. 10.123456 × 8 + 6 =
11. 11.818 × 10 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
13. 13.6 × 9 =
14. 14.If today is Monday, what day will it be after 42 days? (a) Monday (b) Thursday (c) Tuesday (d) Sunday
15. 15.Magic square (every row, column and diagonal has the same total): 7 14 9 | 12 10 ? | 11 6 13. What is the missing number?
16. 16.Magic square (every row, column and diagonal has the same total): 16 ? 12 | 6 10 14 | 8 18 4. What is the missing number?
17. 17.9 × 2 =
18. 18.Think of 5. Multiply it by 5, then add 4. What number do you end with?
19. 19.1 × 9 =
20. 20.24 × 4 =
21. 21.The ages of two twins add up to 20. How old is each twin?
22. 22.If today is Sunday, what day was it 18 days ago? (a) Tuesday (b) Saturday (c) Thursday (d) Wednesday
23. 23.Take 64 and take away the sum of its digits. What do you get?
24. 24.111 × 111 =
25. 25.3 × 9 =
26. 26.?998 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
27. 27.Magic square (every row, column and diagonal has the same total): 14 24 10 | 12 16 20 | ? 8 18. What is the missing number?
28. 28.Half of 178 =
29. 29.9 × 6 =
30. 30.Half of 92 =
31. 31.I thought of a number, added 8 and then doubled it. I got 36. What was my number?
32. 32.12345679 × 72 =
33. 33.The 7th of a month is a Friday. What day is the 17th of the same month? (a) Thursday (b) Sunday (c) Tuesday (d) Monday
34. 34.9 × 6 = ?4 — what is the missing digit?
35. 35.23 × 1000 =
36. 36.12345679 × 81 =
37. 37.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Magic square (every row, column and diagonal has the same total): 22 8 18 | 12 ? 20 | 14 24 10. What is the missing number?
39. 39.Magic trick! Think of 3. Double it, add 16, halve it, then take away 3. What number do you get?
40. 40.7 × 1000 =

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